REPLICAST 616 Metallic Gray Rapid Tooling Urethane


REPLICAST 616 is a two-component, filled urethane tooling material that has very easy handling characteristics and exceptional cured properties. This material tends to have less hard-pack settling in storage, and therefore is usually easier to use than other materials of this type, which tend to settle more rapidly. It is not extremely abrasive, so it can be machined with the proper cutters if desired. REPLICAST 616 has a one-to-one mix ratio by weight or volume, for fast measuring and mixing. It has a shorter pot life than the REPLICAST 612 product, and therefore cures more rapidly. It can be demolded and put into service rather quickly, making it the better choice for thinner castings and when a faster cure time is required. REPLICAST 616 provides an easy to measure and mix, rapid curing system that has tough cured properties and very good heat resistance. It is an excellent choice for patterns, tooling, fixtures and general shop aids

REPLICAST 616 offers the following benefits:
– Less hard-pack filler settling
– Low exotherm during cure for stress-free castings
– Smooth consistency that pours well & duplicates details nicely
– Very good hot strength
– Excellent for smaller to medium size castings
– Low shrinkage, good cured stability


REPLICAST 616 is a modification of the REPLICAST 612 product that has provided excellent service for a number of years. REPLICAST 616 has been developed to provide a shorter working time to allow faster production of smaller to medium size castings. With the faster setting time, it cures quite rapidly in thinner sections than REPLICAST 612 was designed for, so it can be demolded in a short time in those instances. The exact demold time will depend upon the shop conditions and size of the casting. Generally, most castings can be demolded in 30 to 40 minutes, depending upon size, and can be put into service shortly after that. Extremely thin casts, and those made in very cold shop environments should be carefully checked for hardness and degree of cure before demolding, to avoid distortion of the casting. REPLICAST 616 is a highly filled system, and, as such, both components should be checked for settling before making a casting. REPLICAST 616 usually has less hard-pack settling than other products of this type. However, all filled casting systems have the potential to settle in some manner when stored for long periods, so the REPLICAST resin and hardener should be thoroughly stirred before use to insure original manufactured uniformity.

ASTM Method
Mix Ratio, by Weight
100 : 100
ColorMetallic Gray
Mixed Viscosity, @ 77°F
2600 cps
Working Time, 4 fl. oz. Mass @ 77°F
6 min.
Peak Exotherm, 20 lb. Mass. Cast 2 ½” Thick
Cured Hardness, @ RT, @ 150°F
84 D, 80 D
Shrinkage, in./in., Mold # 3, Vol: 1.23 Gal
10″ Long x 4.5 ” Deep
Specific Gravity, grams, cc
Density, lb./cu. inch
Specific Volume, cu. in./lb.
Tensile Strength, psi
4500 psi
Elongation @ Break, % 2.00 %
Flexural Strength, psi
6900 psi
Compressive Strength, psi
9100 psi

Gallon Kit
Kit Volume
   GallonsCubic Inches
Part A
9 lb.
Part B
9 lb.
Kit18 lb.